cdlabelgen: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/cdlabelgen - from package: cdlabelgen

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/cdlabelgen - from package: cdlabelgen

You may install the required package with command apt-get install {package}
Error in other languages:
cdlabelgen: bevel nie gevind nie
cdlabelgen: comandă negăsită
cdlabelgen: comando não encontrado
cdlabelgen: commande introuvable
cdlabelgen: command not found
cdlabelgen: käsku ei ole
cdlabelgen: không tìm thấy lệnh
cdlabelgen: komanda nerasta
cdlabelgen: Kommando nicht gefunden.
cdlabelgen: kommandot finns inte
cdlabelgen: komut yok
cdlabelgen: nie znaleziono polecenia
cdlabelgen: níor aimsíodh an t-ordú
cdlabelgen: no se encontró la orden
cdlabelgen: no s'ha trobat l'ordre
cdlabelgen: opdracht niet gevonden
cdlabelgen: parancs nem található
cdlabelgen: perintah tidak ditemukan
cdlabelgen: príkaz nenájdený
cdlabelgen: příkaz nenalezen
cdlabelgen: команда не найдена
cdlabelgen: командата не е открита
cdlabelgen: 命令找不到
cdlabelgen: コマンドが見つかりません